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[nce] add split patch mode to support modules bigger than 128MB (#3489)

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nce patcher was extended to support modules larger than 128MB due to ARM64 branch limit. now added a pre-patch and (existing) post-patch module code. Allowwing MRS/MSR/SVC handler to remain within branch branch range

Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/3489
Reviewed-by: MaranBr <maranbr@eden-emu.dev>
Reviewed-by: CamilleLaVey <camillelavey99@gmail.com>
Co-authored-by: Maufeat <sahyno1996@gmail.com>
Co-committed-by: Maufeat <sahyno1996@gmail.com>
This commit is contained in:
Maufeat 2026-02-07 22:59:38 +01:00 • committed by crueter
parent ca9f2d43be
commit e544cb3cf6
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GPG key ID: 425ACD2D4830EBC6
5 changed files with 424 additions and 168 deletions
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12
src/core/hle/kernel/code_set.h
View file

@ -1,3 +1,6 @@
// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
// SPDX-License-Identifier: GPL-3.0-or-later
// SPDX-FileCopyrightText: Copyright 2019 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
@ -83,6 +86,14 @@ struct CodeSet final {
const Segment& PatchSegment() const {
return patch_segment;
}
Segment& PostPatchSegment() {
return post_patch_segment;
}
const Segment& PostPatchSegment() const {
return post_patch_segment;
}
#endif
/// The overall data that backs this code set.
@ -93,6 +104,7 @@ struct CodeSet final {
#ifdef HAS_NCE
Segment patch_segment;
Segment post_patch_segment;
#endif
/// The entry point address for this code set.

11
src/core/hle/kernel/k_process.cpp
View file

@ -1,4 +1,4 @@
// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
// SPDX-License-Identifier: GPL-3.0-or-later
// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
@ -1258,6 +1258,7 @@ void KProcess::LoadModule(CodeSet code_set, KProcessAddress base_addr) {
#ifdef HAS_NCE
const auto& patch = code_set.PatchSegment();
const auto& post_patch = code_set.PostPatchSegment();
if (this->IsApplication() && Settings::IsNceEnabled() && patch.size != 0) {
auto& buffer = m_kernel.System().DeviceMemory().buffer;
const auto& code = code_set.CodeSegment();
@ -1265,7 +1266,15 @@ void KProcess::LoadModule(CodeSet code_set, KProcessAddress base_addr) {
Common::MemoryPermission::Read | Common::MemoryPermission::Execute);
buffer.Protect(GetInteger(base_addr + patch.addr), patch.size,
Common::MemoryPermission::Read | Common::MemoryPermission::Execute);
// Protect post-patch segment if it exists like abve
if (post_patch.size != 0) {
buffer.Protect(GetInteger(base_addr + post_patch.addr), post_patch.size,
Common::MemoryPermission::Read | Common::MemoryPermission::Execute);
}
ReprotectSegment(code_set.PatchSegment(), Svc::MemoryPermission::None);
if (post_patch.size != 0) {
ReprotectSegment(code_set.PostPatchSegment(), Svc::MemoryPermission::None);
}
}
#endif
}